Hydraulic type fishing tool for drilled wells



G. W. MOORE April 24, 1951 HYDRAULIC TYPE FISHING TOOL-FOR DRILLED WELLS Filed March 11',

Patented Apr. 24, 1951 UNITED STATES PATENT OFFICE HYDRAULIC TYPE FISHING TOOL FOR DRILLED WELLS 11 Claims.

This invention relates to ahydraulic type junk basket, whereby certain articles in an oil or gas well may be recovered from the bottom of the well. These small articles, such as: rock bits, cutters, reamer pins, core heads, cones, pipe fragments and the like, are termed debris or junk. l An object of my invention is to provide a novel hydraulic type junk basket with a diversion unit forming a part thereof, this diversion unit directing the circulating fluid rst outwardly to the annular area around the tool and then directing the fluid from within the tool to the annular space around the drill pipe or tubing supporting the tool.

Another object of my invention is to provide a novel hydraulic type junk basket including a settling space in which the velocity of the circulating uid is reduced, thus permitting theren covered debris to settle and remain within the basket.

A feature of my invention is to provide a hydraulic type junk basket with a packer or sealing means to separate the downwardly and upwardly moving columns of pressure uid.

Another feature of my invention is to provide a hydraulic type junk basket of the character stated, which is relatively simple in construction and which will effectively recover debris and other small articles from the bottom of a bored hole.

Other objects, advantages and features of in Fig. l is a side elevation of my hydraulic type A junk basket.

Figure 2 is a longitudinal sectional view of the same.

Figure 3 is a sectional view taken on line 3--3 of Figure 1.

Figure 4 is a sectional view taken on line 4 4 of Figure l.

Referring more particularly to the drawing, it is to be understood that my tool may be operated entirely within casing or it may be operated in open hole where the hole is in solid formation, that is, to gauge, or the tool may be operated partly within a cased area and partly in open hole.

My tool includes essentially three elements, a junk basket I, a settling basin 2, and a diversion unit 3. t is to be understood that these units may be spaced vertically in any manner desired and which will conform to the requirements of the well. The elements I, 2 and 3, as stated, f

which comprise my hydraulic type junk basket, are superimposed, substantially as shown, `and are attached to the lower end of a drill pipe or tubing 4. v

The circulation of uid in an oil well is usual and well known and this fiuid is pumped downwardly into the drill pipe or tubing 4 by means of pressure pumps on the surface, which are not shown since they are usual and well known. A collar 5 screws on to the bottom of the pipe 4 and on to the tube 6, which forms part of the diversion unit 3. A flexible packer or cup 'I is rotatably mounted on the tube 6 and this cup expands outwardly and seals the space between the tube 6 and the casing or bore 8. The cup 'I is mounted on a sleeve I which is ro-tatable on the outer surface of the pipe. A ring pack ing 'Ia may be mounted inside of the sleeve I to seal the space between the sleeve and the outside of the tube t. This annular space is indicated at 9. A transverse wall I0 is provided in the tube 6 and a diversion pipe II extends through this wall and thence outwardly and through the side of the tube 6, below the cup l, thus the downwardly moving circulating iiuid in the drill pipe 4 is diverted outwardly below the cup I and into the annular space 9. The subsequent course of this iiuid will be further described.

A second diversion pipe I2 extends upwardly from the transverse wall I0 and thence .out through the side of lthe tube (i, above the cup l, thus the upwardlymoving fluid is diverted to the space within the casing 8 and can flow upwardly to the surface of the ground in the usual manner.

The settling basing element 2 consists of a pipe section I3, which is threaded or otherwise attached to the bottom of the tube 5. The pipe I3 also is provided with a transverse wall I4, through which lthe pipe I5 extends and projects upwardly into the pipe I3. The fluid, in passing through the Venturi pipe I5, increases in velocity and then suddenly passes into the enlarged area of the pipe I3, thus losing its velocity and permitting any small articles, junk o-r debris, to settle out aroundY the Venturi pipe I5 and within the pipe I3.

The junk basket element I includes a cylinder Iii, which is threaded onto or otherwise flxedly attached to the bottom of the pipe I3. This cylinder is open at the bottom and is provided with the usual teeth il and also with suitable retainer fingers I, so that articles forced through `these fingers will be retained within the junk basket or cylinder It, and may be Vwithdrawn to the surface. A ap valve I9 may be mounted adjacent the upper end of the cylinder I6, if desired. This flap valve may serve to entrap some articles above it, however, the ap valve is not absolutely essential but may be alternatively used.

In operation, the tool is mounted on tubing or drill pipe and is lowered to the bottom of the bored hole. The junk or debris to be recovered is at the bottom and the tool will surround or partially surround this debris. r1Ehe cup 'l engages the wall of the bored hole (the casing or open hole). The pressure pumps at the surface are now started and fluid is forced downwardly through the pipe fi, thence through the diversion pipe l I, below the cup 1, and thence downwardly into the annular space 9. The cup l prevents the fluid from moving upwardly and, consequently, the iiuid must pass downwardly around the bottom edge of the cylinder or junk basket l and then upwardly into this cylinder. The velocity of the uid will pick up the debris, carrying it into the cylinder I6, through the ngers i8. The fluid, due to its velocity, might still be carrying small articles of junk, and, consequently, moves upwardly through the Venturi tube I5 and then into the larger pipe i3, where the velocity is reduced. The small junk will then settle around the outside of the pipe i 5 and within the pipe i3, and the relatively clean fluid will pass upwardly through the diversion pipe I2, into the casing above the cup i and thence to the surface. It is thus evident that the cup l separates the downwardly moving and the upwardly moving uid, compelling this uid to pass downwardly around the lower edge of the junk basket and moving any debris which is in the hole.

Having described my invention, I claim:

1. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecte ing basket mounted below said diversion unit, a packer cup on said diversion unit means rotatably mounting said packer cup on said diversion unit, a by-pass pipe within said diversion unit and opening through the ywall of said diversion unit below the packer cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall of the diversion unit above the packer cup, and a transverse wall in said diversion unit, both of said by-pass pipes extending through said transverse wall.

2. A well clean out hydraulic type basket comprising a diversion unit, means securing said di- Vversion unit to a string'of pipe, a junk collecting basket mounted below said diversion unit, a packer cup on said diversion unit, a by-pass pipe within said diversion unit and opening through the wall of said diversion unit below the lpacker cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall of the diversion unit above the packer cup, a transverse wall in said diversion unit, each of said by-pass pipes extending through said wall.

3. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecting basket mounted below said diversion unit, a packer cup on said diversion unit, a by-pass pipe within said diversion unit and opening through the wall of said diversion unit below the packer cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the Wall of the diversion unit above the packer cup, a transverse wall in said diversion unit, both of ysaid by-pass pipes extending through said transverse wall, and a settling basin between said basket and diversion unit.

4. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecting basket mounted below said diversion unit, a packer cup on said diversion unit, a by-pass pipe within said diversion unit and opening through the wall of said diversion unit below the packer cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall of the diversion unit above the packer cup, a transverse wall in said diversion unit, both of said by-pass pipes extending through said transverse wall, and a settling basin between said basket and ldiversion unit, and a vertically extending constrictor pipe in the settling basin.

5. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecting basket mounted below said diversion unit, a

packer cup on said diversion unit, a by-pass pipe' within said diversion unit and opening through the wall of said diversion unit below the packer cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall of the diversion unit above the packer cup, a transverse wall in said diversion unit, each of said by-pass pipes extending through said wall, a settling basin positioned between the basket and the diversion unit, and a constrictor pipe in the settling basin extending vertically thereof.

G. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecting basket mounted below said diversion unit, a packer cup on said diversion unit, a by-pass pipe within said diversion unit and opening through the wall of said diversion unit below the packer cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall of the diversion unit above the packer cup, a transverse wall in said diversion unit, both of said by-pass pipes extending through said transverse wall, a plurality of ilexible ngers in the basket, said ingers retaining the junk as it enters the basket, and a flap valve Vabove said basket.

'7. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecting basket mounted below said diversion unit, a packer cup on said diversion unit, a by-pass pipe within said diversion unit and opening through the wall of said diversion unit below the packer cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall of the diversion unit above the packer cup,

. a transverse wall in said diversion unit, both of said bypass pipes extending through said transverse wall, a plurality of iexible ngers in the basket, said fingers retaining the junk after it enters the basket, and a flap valve above said basket, a settling basin between the basket and the diversion unit, and a constrictor pipe in the settling basin, extending vertically thereof.

8. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecting basket mounted below said diversion unit, a packer cup on said diversion unit, a by-pass pipe within said diversion unit and opening through the wall of said diversion unit below the packer cup, a second by-pass pipe in the diversion unit,

said second by-pass pipe opening through the wall of the diversion unit above the packer cup, a transverse Wall in said diversion unit, each of said by-pass pipes extending through said wall, a settling basin between the basket and the diversion unit, and a constrictor pipe in the settling basin extending vertically thereof.

9. A well clean out hydraulic type basket comprising a diversion unit, means securing said diversion unit to a string of pipe, a junk collecting basket mounted below said diversion unit, a packer cup on said diversion unit, a by-pass pipe Within said diversion unit and opening through the wall of said diversion unit below the packer cup, a, second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall of the diversion unit above the packer cup, a transverse wall in said diversion unit, each of said by-pass pipes extending through said Wall, flexible fingers in said basket whereby junk is retained therein, and a ap valve adjacent the upper end of said basket.

10. In an oil well tool, a uid'diversion unit, means securing said diversion unit to a string of pipe, a packer cup on said diversion unit, a bypass pipe within said diversion unit and opening through the Wall thereof below the packer cup.

a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall thereof above the packer cup, a transverse Wall in said diversion unit, both of said lby-pass pipes extending, through said transverse wall, and

means rotatably mounting said packer cup on said diversion unit.

11. In an oil well tool, a fluid diversion unit, means securing said diversion unit to a string of pipe, a packer cup on said diversion unit, a bypass pipe within said diversion unit and opening through the wall thereof below the packer cup, a second by-pass pipe in the diversion unit, said second by-pass pipe opening through the wall thereof abovev the packer cup, a transverse wall within said diversion unit, both of said pipes extending through said wall.

GEORGE WALDO MOORE.

REFERENCES CITED The vfollowing references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,181,187 Jennings Nov. 28, 1939. 2,360,311 Ausburn et al.'-- Oct. 17, 1944 

